# cardinal number

A cardinal number is an ordinal number $S$ with the property that $S\leq X$ for every ordinal number $X$ which has the same cardinality as $S$. Cardinal numbers have the property that for every set $A$, there exists a unique cardinal number having the same number of elements as $A$.

Title cardinal number CardinalNumber 2013-03-22 12:07:58 2013-03-22 12:07:58 djao (24) djao (24) 8 djao (24) Definition msc 03E10 cardinal Cardinality CardinalArithmetic